1. Differential Diagnosis of Asthma Dr. R. Amin Professor of Allergy and Clinical Immunology Shiraz University of Medical Sciences

2. Differential diagnosis possibilities for asthma in infants and children Upper airway diseases –Allergic rhinitis and sinusitis Obstructions involving large airways –Foreign body in the trachea or bronchus –Vocal cord dysfunction –Vascular rings or laryngeal webs –Laryngotracheomalacia, tracheal stenosis, or bronchostenosis –Enlarged lymph nodes or tumor Obstructions involving small airways –Viral bronchiolitis or obliterative bronchiolitis –Cystic fibrosis –Bronchopulmonary dysplasia (chronic lung disease of prematurity) –Heart disease Other causes –Recurrent cough not due to asthma (infection, habit cough, postnasal drip) –Aspiration from swallowing mechanism dysfunction of GERD